Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5665
Number of amino acids:254
Molecular Weight:26986.96 Da
Theoretical pI:6.13


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)3112.2%
Cysteine CYS (C)103.94%
Glutamic Acid GLU (E)72.76%
Aspartic Acid ASP (D)103.94%
Glycine GLY (G)3112.2%
Phynylalanine PHE (F)72.76%
Isoleucine ILE (I)41.57%
Histidine HIS (H)20.79%
Lysine LYS (K)41.57%
Methionine MET (M)51.97%
Leucine LEU (L)145.51%
Asparagine ASN (N)124.72%
Glutamine GLN (Q)83.15%
Proline PRO (P)83.15%
Serine SER (S)2610.24%
Arginine ARG (R)124.72%
Threonine THR (T)197.48%
Tryptophan TRP (W)93.54%
Valine VAL (V)197.48%
Tyrosine TYR (Y)166.3%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1184
HydrogenH1771
NitrogenN327
OxygenO370
SulphurS15

FormulaC1184H1771N327O370S15
Total Number of Atoms:3667


Total number of positively charged residues (ARG + LYS):16
Total number of negatively charged residues (ASP + GLU):17
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    73965
Absorption 0.1% (=1 g/l)    2.741,   assuming all pairs of CYS residues form cystines

Ext. coefficient    73340
Absorption 0.1% (=1 g/l)    2.718,   assuming all CYS residues are reduced
Aromaticity:0.126

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 33.39

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[27.17, 30.32, 22.44]

Amino acids in helix: V, I, Y, F, W, L || Amino acids in turn: N, P, G, S || Amino acids in sheet: E, M, A, L
Aliphatic index:61.5354
Grand average of hydropathicity (GRAVY):-0.13